Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activites
Net Income (Loss)	$ 2,196.7	$ 1,919.8	$ 1,931.3
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	2,682.8	2,514.5	2,286.6
Rockport Plant, Unit 2 Operating Lease Amortization	136.5	136.5	0.0
Deferred Income Taxes	196.1	(17.8)	104.3
Asset Impairments and Other Related Charges	0.0	156.4	70.6
Allowance for Equity Funds Used During Construction	(148.1)	(168.4)	(132.5)
Mark-to-Market of Risk Management Contracts	66.5	(29.2)	(66.4)
Amortization of Nuclear Fuel	87.5	89.1	113.8
Pension and Postemployment Benefit Reserves	(8.5)	(24.6)	(42.8)
Pension Contributions to Qualified Plan Trust	(110.3)	0.0	0.0
Property Taxes	(43.3)	(73.8)	(59.1)
Deferred Fuel Over/Under-Recovery, Net	(31.8)	85.2	189.7
Change in Regulatory Assets	(337.9)	49.5	354.1
Change in Other Noncurrent Assets	(142.5)	(112.8)	(172.1)
Change in Other Noncurrent Liabilities	(54.5)	(116.1)	129.0
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(129.3)	247.8	145.9
Fuel, Materials and Supplies	(142.9)	(248.2)	20.7
Accounts Payable	(35.3)	5.8	36.6
Accrued Taxes, Net	20.1	138.9	153.2
Rockport Plant, Unit 2 Operating Lease Payments	(147.7)	(147.7)	0.0
Other Current Assets	34.3	70.7	10.5
Other Current Liabilities	(255.5)	(205.5)	149.8
Net Cash Flows from Operating Activities	3,832.9	4,270.1	5,223.2
Investing Activities
Construction Expenditures	(6,246.3)	(6,051.4)	(6,310.9)
Purchases of Investment Securities	(1,678.8)	(1,576.0)	(2,067.8)
Sales of Investment Securities	1,644.3	1,494.2	2,010.0
Acquisitions of Nuclear Fuel	(69.7)	(92.3)	(46.1)
Acquisition of Assets	0.0	(918.4)	0.0
Other Investing Activities	116.6	(0.6)	61.2
Net Cash Flows Used for Investing Activities	(6,233.9)	(7,144.5)	(6,353.6)
Financing Activities
Issuance of Common Stock, Net	155.0	65.3	73.6
Issuance of Long-term Debt	5,626.1	4,536.6	4,945.7
Issuance of Short-term Debt with Original Maturities Greater Than 90 Days	1,396.5	0.0	205.6
Change in Short-term Debt with Original Maturities Less Than 90 Days, Net	(448.4)	928.3	271.4
Retirement of Long-term Debt	(1,339.8)	(1,220.8)	(2,782.0)
Redemption of Short-term Debt with Original Maturities Greater Than 90 Days	(1,307.1)	0.0	(205.6)
Principal Payments for Finance Lease Obligations	(61.7)	(70.7)	(65.1)
Dividends Paid on Common Stock	(1,424.9)	(1,350.0)	(1,255.5)
Redemption of Noncontrolling Interest	(100.2)	0.0	0.0
Other Financing Activities	(88.8)	(25.8)	(26.2)
Net Cash Flows from Financing Activities	2,406.7	2,862.9	1,161.9
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	5.7	(11.5)	31.5
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	432.6	444.1	412.6
Cash and Cash Equivalents at Beginning of Period	246.8
Cash, Cash Equivalents and Restricted Cash at End of Period	438.3	432.6	444.1
Cash and Cash Equivalents at End of Period	392.7	246.8
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	1,029.1	1,022.5	939.3
Net Cash Paid (Received) for Income Taxes	(49.1)	6.1	(24.7)
Construction Expenditures Included in Current Liabilities as of December 31,	975.4	1,341.1	1,120.4
Acquisition of Nuclear Fuel Included in Current Liabilities as of December 31,	33.4	0.1	4.0
Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage	2.6	0.3	2.2
Noncash Increase in Advances to Affiliates, Net due to Contribution of Mutual Energy SWEPCo, LLC	0.0	0.0	84.0
AEP Texas Inc. [Member]
Operating Activites
Net Income (Loss)	241.0	178.3	211.3
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	529.8	622.3	499.6
Deferred Income Taxes	(15.2)	(23.5)	(16.5)
Asset Impairments and Other Related Charges	0.0	32.5	0.0
Allowance for Equity Funds Used During Construction	(19.4)	(15.2)	(20.0)
Mark-to-Market of Risk Management Contracts	0.0	(0.2)	0.7
Pension Contributions to Qualified Plan Trust	(11.3)	0.0	0.0
Change in Other Noncurrent Assets	(74.0)	9.3	(60.3)
Change in Other Noncurrent Liabilities	(24.7)	11.3	44.9
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	9.8	3.5	(2.9)
Fuel, Materials and Supplies	(7.4)	(1.0)	(6.0)
Accounts Payable	30.2	7.5	(20.3)
Accrued Taxes, Net	42.7	(11.8)	(5.6)
Other Current Assets	0.8	(0.4)	0.8
Other Current Liabilities	(88.1)	10.8	26.2
Net Cash Flows from Operating Activities	614.2	823.4	651.9
Investing Activities
Construction Expenditures	(1,295.0)	(1,275.1)	(1,428.8)
Change in Advances to Affiliates, Net	200.1	(199.2)	103.9
Other Investing Activities	29.5	2.1	35.2
Net Cash Flows Used for Investing Activities	(1,065.4)	(1,472.2)	(1,289.7)
Financing Activities
Capital Contributions from Member	0.0	200.0	200.0
Issuance of Long-term Debt	652.7	1,070.4	494.0
Change in Advances from Affiliates, Net	67.1	(216.0)	216.0
Retirement of Long-term Debt	(392.1)	(401.8)	(266.1)
Principal Payments for Finance Lease Obligations	(6.3)	(5.1)	(4.7)
Other Financing Activities	0.8	(0.7)	1.2
Net Cash Flows from Financing Activities	322.2	646.8	640.4
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	(129.0)	(2.0)	2.6
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	157.8	159.8	157.2
Cash and Cash Equivalents at Beginning of Period	3.1
Cash, Cash Equivalents and Restricted Cash at End of Period	28.8	157.8	159.8
Cash and Cash Equivalents at End of Period	0.1	3.1
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	153.2	148.6	145.9
Net Cash Paid (Received) for Income Taxes	(42.9)	(11.0)	7.9
Noncash Acquisitions Under Finance Leases	5.6	11.4	10.6
Construction Expenditures Included in Current Liabilities as of December 31,	177.8	225.5	243.1
AEP Transmission Co [Member]
Operating Activites
Net Income (Loss)	423.4	439.7	315.9
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	249.0	176.0	133.9
Deferred Income Taxes	81.6	91.3	98.9
Allowance for Equity Funds Used During Construction	(74.0)	(84.3)	(70.6)
Property Taxes	(26.6)	(35.6)	(32.9)
Change in Other Noncurrent Assets	(8.2)	9.6	14.6
Change in Other Noncurrent Liabilities	8.3	(8.1)	17.4
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(19.0)	(5.4)	36.7
Fuel, Materials and Supplies	5.3	5.2	(5.4)
Accounts Payable	77.8	37.6	(7.5)
Accrued Taxes, Net	62.7	90.8	73.4
Accrued Interest	4.7	3.3	0.9
Other Current Assets	0.7	(0.3)	(0.3)
Other Current Liabilities	(14.5)	(11.2)	(26.4)
Net Cash Flows from Operating Activities	771.2	708.6	548.6
Investing Activities
Construction Expenditures	(1,615.9)	(1,410.1)	(1,526.4)
Change in Advances to Affiliates, Net	(23.7)	11.5	49.4
Acquisition of Assets	(6.0)	(9.4)	(37.4)
Other Investing Activities	5.2	4.8	1.1
Net Cash Flows Used for Investing Activities	(1,640.4)	(1,403.2)	(1,513.3)
Financing Activities
Capital Contributions from Member	335.0	0.0	664.0
Issuance of Long-term Debt	519.5	688.0	321.0
Change in Advances from Affiliates, Net	19.7	91.6	29.7
Retirement of Long-term Debt	0.0	(85.0)	(50.0)
Principal Payments for Finance Lease Obligations	0.0	0.0
Dividends Paid to Member	(5.0)	0.0	0.0
Net Cash Flows from Financing Activities	869.2	694.6	964.7
Net Increase (Decrease) in Cash and Cash Equivalents	0.0	0.0	0.0
Cash and Cash Equivalents at Beginning of Period	0.0	0.0	0.0
Cash and Cash Equivalents at End of Period	0.0	0.0	0.0
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	119.7	90.6	80.2
Net Cash Paid (Received) for Income Taxes	22.9	1.5	(30.7)
Construction Expenditures Included in Current Liabilities as of December 31,	311.9	472.7	345.0
Noncash Distribution of Radial Assets to Member	(50.0)	0.0	0.0
Appalachian Power Co [Member]
Operating Activites
Net Income (Loss)	369.7	306.3	367.8
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	507.5	466.8	428.4
Deferred Income Taxes	(26.2)	(126.2)	(16.8)
Asset Impairments and Other Related Charges	0.0	92.9	0.0
Carrying Costs Income	0.0	0.0	(1.3)
Allowance for Equity Funds Used During Construction	(14.6)	(16.6)	(13.2)
Mark-to-Market of Risk Management Contracts	18.8	19.9	(33.0)
Pension Contributions to Qualified Plan Trust	(7.0)	0.0	0.0
Deferred Fuel Over/Under-Recovery, Net	37.2	57.1	(10.8)
Re-Establishment of Regulatory Asset - Coal Fired Generation	(49.0)	0.0	0.0
Change in Other Noncurrent Assets	(40.4)	(38.2)	58.1
Change in Other Noncurrent Liabilities	11.2	(40.3)	(4.8)
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(30.2)	35.7	33.6
Fuel, Materials and Supplies	(38.2)	(93.4)	27.8
Accounts Payable	(48.1)	37.7	(13.3)
Accrued Taxes, Net	31.3	(10.2)	(13.2)
Other Current Assets	18.3	15.4	(6.1)
Other Current Liabilities	(28.3)	(45.5)	42.1
Net Cash Flows from Operating Activities	712.0	661.4	846.6
Investing Activities
Construction Expenditures	(767.4)	(862.6)	(780.7)
Change in Advances to Affiliates, Net	0.7	0.9	0.5
Other Investing Activities	8.8	24.3	10.8
Net Cash Flows Used for Investing Activities	(757.9)	(837.4)	(769.4)
Financing Activities
Issuance of Long-term Debt	606.9	478.2	203.2
Change in Advances from Affiliates, Net	(218.1)	31.1	19.6
Retirement of Long-term Debt	(140.3)	(180.5)	(124.0)
Principal Payments for Finance Lease Obligations	(7.4)	(6.7)	(6.9)
Dividends Paid to Member	(200.0)	(150.0)	(160.0)
Other Financing Activities	0.7	0.9	1.5
Net Cash Flows from Financing Activities	41.8	173.0	(66.6)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	(4.1)	(3.0)	10.6
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	26.8	29.8	19.2
Cash and Cash Equivalents at Beginning of Period	3.3
Cash, Cash Equivalents and Restricted Cash at End of Period	22.7	26.8	29.8
Cash and Cash Equivalents at End of Period	5.8	3.3
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	207.1	190.7	182.0
Net Cash Paid (Received) for Income Taxes	0.0	63.0	(13.0)
Noncash Acquisitions Under Finance Leases	7.2	8.8	5.5
Construction Expenditures Included in Current Liabilities as of December 31,	105.6	149.7	134.4
Indiana Michigan Power Co [Member]
Operating Activites
Net Income (Loss)	284.8	269.4	261.3
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	411.6	350.6	293.1
Rockport Plant, Unit 2 Operating Lease Amortization	69.2	69.2	0.0
Deferred Income Taxes	(16.2)	(52.7)	(42.9)
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expenses, Net	24.4	(26.4)	29.2
Allowance for Equity Funds Used During Construction	(11.5)	(19.4)	(11.9)
Mark-to-Market of Risk Management Contracts	5.9	(0.6)	(4.1)
Amortization of Nuclear Fuel	87.5	89.1	113.8
Pension Contributions to Qualified Plan Trust	(6.4)	0.0	0.0
Deferred Fuel Over/Under-Recovery, Net	12.4	(24.3)	39.7
Change in Other Noncurrent Assets	6.1	8.3	(36.5)
Change in Other Noncurrent Liabilities	45.0	33.7	72.1
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	14.5	35.4	4.8
Fuel, Materials and Supplies	(34.7)	(22.4)	(11.2)
Accounts Payable	(10.8)	3.6	(14.1)
Accrued Taxes, Net	(20.2)	48.3	41.2
Rockport Plant, Unit 2 Operating Lease Payments	(73.9)	(73.9)	0.0
Other Current Assets	14.3	11.2	1.5
Other Current Liabilities	(25.7)	(13.9)	(10.3)
Net Cash Flows from Operating Activities	776.3	685.2	725.7
Investing Activities
Construction Expenditures	(544.7)	(585.9)	(568.5)
Change in Advances to Affiliates, Net	(0.1)	(0.5)	(0.3)
Purchases of Investment Securities	(1,637.2)	(1,531.0)	(2,064.7)
Sales of Investment Securities	1,593.4	1,473.0	2,010.0
Acquisitions of Nuclear Fuel	(69.7)	(92.3)	(46.1)
Other Investing Activities	9.4	16.6	14.8
Net Cash Flows Used for Investing Activities	(648.9)	(720.1)	(654.8)
Financing Activities
Issuance of Long-term Debt	69.5	123.3	1,168.1
Change in Advances from Affiliates, Net	(11.4)	113.3	(210.5)
Retirement of Long-term Debt	(93.2)	(117.1)	(884.9)
Principal Payments for Finance Lease Obligations	(6.5)	(5.7)	(8.8)
Dividends Paid to Member	(85.0)	(80.0)	(124.7)
Other Financing Activities	0.5	0.7	(9.0)
Net Cash Flows from Financing Activities	(126.1)	34.5	(69.8)
Net Increase (Decrease) in Cash and Cash Equivalents	1.3	(0.4)	1.1
Cash and Cash Equivalents at Beginning of Period	2.0	2.4	1.3
Cash and Cash Equivalents at End of Period	3.3	2.0	2.4
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	107.6	111.9	116.9
Net Cash Paid (Received) for Income Taxes	42.1	3.4	32.6
Noncash Acquisitions Under Finance Leases	3.0	11.9	5.8
Construction Expenditures Included in Current Liabilities as of December 31,	62.8	86.0	93.0
Acquisition of Nuclear Fuel Included in Current Liabilities as of December 31,	33.4	0.1	4.0
Expected Reimbursement For Spent Nuclear Fuel Dry Cask Storage	2.6	0.3	2.2
Ohio Power Co [Member]
Operating Activites
Net Income (Loss)	271.4	297.1	325.5
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	276.6	240.9	259.7
Amortization of Generation Deferrals	0.0	65.3	223.9
Deferred Income Taxes	77.2	43.8	(36.2)
Carrying Costs Income	(1.6)	(1.0)	(1.7)
Allowance for Equity Funds Used During Construction	(12.5)	(18.2)	(9.8)
Mark-to-Market of Risk Management Contracts	6.7	4.0	(32.2)
Property Taxes	(16.6)	(33.7)	(12.5)
Refund of Global Settlement	0.0	(16.5)	(5.5)
Reversal of a Regulatory Provision	0.0	(56.2)	0.0
Change in Regulatory Assets	(69.4)	(20.1)	171.5
Change in Other Noncurrent Assets	(49.4)	(35.3)	(11.5)
Change in Other Noncurrent Liabilities	(66.4)	(93.2)	53.8
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	4.2	75.0	43.1
Fuel, Materials and Supplies	(23.9)	(16.4)	(11.3)
Accounts Payable	10.3	0.4	(13.8)
Accrued Taxes, Net	43.3	38.7	26.8
Other Current Assets	1.9	0.8	8.1
Other Current Liabilities	(42.5)	(55.2)	49.1
Net Cash Flows from Operating Activities	410.9	421.2	1,028.7
Investing Activities
Construction Expenditures	(813.2)	(799.2)	(725.9)
Other Investing Activities	22.2	55.1	18.4
Net Cash Flows Used for Investing Activities	(791.0)	(744.1)	(707.5)
Financing Activities
Issuance of Long-term Debt	347.0	444.3	392.8
Change in Advances from Affiliates, Net	128.2	16.9	26.3
Retirement of Long-term Debt	(0.1)	(80.3)	(397.1)
Principal Payments for Finance Lease Obligations	(4.7)	(3.5)	(3.8)
Dividends Paid to Member	(87.5)	(85.0)	(337.5)
Other Financing Activities	0.9	1.7	0.9
Net Cash Flows from Financing Activities	383.8	294.1	(318.4)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	3.7	(28.8)	2.8
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	3.7	32.5	29.7
Cash and Cash Equivalents at Beginning of Period	3.7
Cash, Cash Equivalents and Restricted Cash at End of Period	7.4	3.7	32.5
Cash and Cash Equivalents at End of Period	7.4	3.7
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	111.2	100.6	97.1
Net Cash Paid (Received) for Income Taxes	(26.9)	7.3	51.3
Noncash Acquisitions Under Finance Leases	6.1	11.3	4.4
Construction Expenditures Included in Current Liabilities as of December 31,	76.7	125.9	98.2
Public Service Co Of Oklahoma [Member]
Operating Activites
Net Income (Loss)	123.0	137.6	83.2
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	173.5	169.5	164.0
Deferred Income Taxes	17.0	(18.2)	(31.1)
Allowance for Equity Funds Used During Construction	(4.0)	(2.7)	(0.4)
Mark-to-Market of Risk Management Contracts	5.5	(6.4)	(3.0)
Deferred Fuel Over/Under-Recovery, Net	(94.0)	43.8	57.4
Change in Other Noncurrent Assets	(17.9)	5.7	0.0
Change in Other Noncurrent Liabilities	1.6	(7.3)	21.4
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	1.4	15.4	5.1
Fuel, Materials and Supplies	(14.1)	(1.9)	(2.6)
Accounts Payable	(29.5)	7.0	17.7
Accrued Taxes, Net	3.6	3.9	13.2
Other Current Assets	4.6	(0.7)	(0.8)
Other Current Liabilities	(13.7)	4.6	6.4
Net Cash Flows from Operating Activities	157.0	350.3	330.5
Investing Activities
Construction Expenditures	(337.9)	(291.9)	(240.2)
Change in Advances to Affiliates, Net	38.8	(38.8)	0.0
Other Investing Activities	4.0	2.6	7.2
Net Cash Flows Used for Investing Activities	(295.1)	(328.1)	(233.0)
Financing Activities
Issuance of Long-term Debt	0.0	349.5	0.0
Change in Advances from Affiliates, Net	155.4	(105.5)	(44.1)
Retirement of Long-term Debt	(13.2)	(250.5)	(0.5)
Principal Payments for Finance Lease Obligations	(3.5)	(3.1)	(3.3)
Dividends Paid to Member	0.0	(11.3)	(50.0)
Other Financing Activities	0.5	(1.8)	0.8
Net Cash Flows from Financing Activities	139.2	(22.7)	(97.1)
Net Increase (Decrease) in Cash and Cash Equivalents	1.1	(0.5)	0.4
Cash and Cash Equivalents at Beginning of Period	1.5	2.0	1.6
Cash and Cash Equivalents at End of Period	2.6	1.5	2.0
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	59.1	61.1	62.0
Net Cash Paid (Received) for Income Taxes	(11.8)	22.4	17.9
Noncash Acquisitions Under Finance Leases	3.2	5.3	4.3
Construction Expenditures Included in Current Liabilities as of December 31,	35.5	46.0	33.2
Noncash Contribution of Radial Assets from Parent	50.0	0.0	0.0
Southwestern Electric Power Co [Member]
Operating Activites
Net Income (Loss)	183.7	162.2	152.2
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	272.7	249.1	239.5
Deferred Income Taxes	32.4	(11.0)	1.2
Allowance for Equity Funds Used During Construction	(7.7)	(6.8)	(6.0)
Mark-to-Market of Risk Management Contracts	(0.1)	0.8	4.0
Pension Contributions to Qualified Plan Trust	(8.9)	0.0	0.0
Deferred Fuel Over/Under-Recovery, Net	26.3	16.5	(2.4)
Change in Regulatory Assets	(108.4)	3.5	(0.7)
Change in Other Noncurrent Assets	16.1	2.7	(18.1)
Change in Other Noncurrent Liabilities	25.2	2.7	42.8
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	7.3	0.0	53.5
Fuel, Materials and Supplies	(46.4)	(46.1)	3.5
Accounts Payable	11.1	(28.4)	0.9
Accrued Taxes, Net	(23.1)	(3.2)	2.3
Other Current Assets	(2.8)	(8.9)	15.6
Other Current Liabilities	(21.1)	6.7	16.5
Net Cash Flows from Operating Activities	356.3	339.8	504.8
Investing Activities
Construction Expenditures	(402.7)	(412.7)	(451.0)
Change in Advances to Affiliates, Net	0.0	81.3	(81.4)
Proceeds from Sales of Assets	4.4	0.2	1.4
Other Investing Activities	5.7	1.0	2.1
Net Cash Flows Used for Investing Activities	(392.6)	(330.2)	(528.9)
Financing Activities
Issuance of Long-term Debt	0.0	0.0	1,065.7
Change in Short-term Debt with Original Maturities Less Than 90 Days, Net	16.7	18.3	(22.0)
Change in Advances from Affiliates, Net	64.7	59.9	(118.7)
Retirement of Long-term Debt	(21.2)	(59.7)	(794.5)
Principal Payments for Finance Lease Obligations	(10.9)	(11.0)	(11.5)
Dividends Paid to Member	0.0	(37.5)	(65.0)
Dividends Paid on Common Stock	(1.9)	(3.3)	(4.3)
Other Financing Activities	0.5	0.8	(2.7)
Net Cash Flows from Financing Activities	47.9	(32.5)	47.0
Net Increase (Decrease) in Cash and Cash Equivalents	11.6	(22.9)	22.9
Cash and Cash Equivalents at Beginning of Period	1.6	24.5	1.6
Cash and Cash Equivalents at End of Period	13.2	1.6	24.5
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	110.7	111.1	125.7
Net Cash Paid (Received) for Income Taxes	4.3	8.6	18.8
Noncash Acquisitions Under Finance Leases	8.9	7.4	3.6
Construction Expenditures Included in Current Liabilities as of December 31,	$ 46.0	$ 69.1	$ 42.0