Financial Statements of Parent Company Guarantor - Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 177.8	$ 238.5	$ 173.3	$ 126.3
Accounts and notes receivable, net	764.5	764.0
Inventories	565.4	524.2
Other current assets	247.1	253.4
Current assets held for sale	0.0	891.9
Total current assets	1,754.8	2,672.0
Property, plant and equipment, net	550.9	538.6
Other assets
Investments in subsidiaries	0.0	0.0
Goodwill	4,314.2	4,217.4
Intangibles, net	1,624.3	1,631.8
Other non-current assets	424.9	182.1
Non-current assets held for sale	0.0	2,292.9
Total other assets	6,363.4	8,324.2
Total assets	8,669.1	11,534.8
Current liabilities
Long-term Debt, Current Maturities	0.3	0.8
Accounts payable	407.8	436.6
Employee compensation and benefits	143.8	166.1
Other current liabilities	496.5	511.5
Current liabilities held for sale	0.0	356.2
Total current liabilities	1,048.4	1,471.2
Other liabilities
Long-term debt	1,698.9	4,278.4
Pension and other post-retirement compensation and benefits	268.4	253.4
Deferred tax liabilities	546.5	609.5
Other non-current liabilities	203.4	162.0
Non-current liabilities held for sale	0.0	505.9
Total liabilities	3,765.6	7,280.4
Equity
Total equity	4,903.5	4,254.4	4,166.3	4,008.8
Total liabilities and equity	8,669.1	11,534.8
Parent Company Guarantor
Current assets
Cash and cash equivalents	0.1	0.0	0.0	0.0
Accounts and notes receivable, net	3.4	0.1
Inventories	0.0	0.0
Other current assets	2.3	1.2
Current assets held for sale		0.0
Total current assets	5.8	1.3
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	4,821.0	4,509.5
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	195.4	2.2
Non-current assets held for sale		0.0
Total other assets	5,016.4	4,511.7
Total assets	5,022.2	4,513.0
Current liabilities
Long-term Debt, Current Maturities	0.0	0.0
Accounts payable	0.3	0.7
Employee compensation and benefits	0.1	0.8
Other current liabilities	83.4	95.2
Current liabilities held for sale		0.0
Total current liabilities	83.8	96.7
Other liabilities
Long-term debt	0.0	148.1
Pension and other post-retirement compensation and benefits	0.0	0.0
Deferred tax liabilities	0.0	0.0
Other non-current liabilities	34.9	13.8
Non-current liabilities held for sale		0.0
Total liabilities	118.7	258.6
Equity
Total equity	4,903.5	4,254.4
Total liabilities and equity	5,022.2	4,513.0
Guarantor Subsidiary [Member]
Current assets
Cash and cash equivalents	0.0	0.0	0.0	0.0
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	1.9	4.1
Current assets held for sale		0.0
Total current assets	1.9	4.1
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	4,819.2	4,471.4
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	1.2	35.2
Non-current assets held for sale		0.0
Total other assets	4,820.4	4,506.6
Total assets	4,822.3	4,510.7
Current liabilities
Long-term Debt, Current Maturities	0.0	0.0
Accounts payable	0.0	0.0
Employee compensation and benefits	0.0	0.0
Other current liabilities	1.3	1.2
Current liabilities held for sale		0.0
Total current liabilities	1.3	1.2
Other liabilities
Long-term debt	0.0	0.0
Pension and other post-retirement compensation and benefits	0.0	0.0
Deferred tax liabilities	0.0	0.0
Other non-current liabilities	0.0	0.0
Non-current liabilities held for sale		0.0
Total liabilities	1.3	1.2
Equity
Total equity	4,821.0	4,509.5
Total liabilities and equity	4,822.3	4,510.7
Subsidiary Issuer
Current assets
Cash and cash equivalents	51.0	0.0	0.1	0.1
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	0.0	1.1
Current assets held for sale		0.0
Total current assets	51.0	1.1
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	7,078.4	9,295.5
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	570.6	717.8
Non-current assets held for sale		0.0
Total other assets	7,649.0	10,013.3
Total assets	7,700.0	10,014.4
Current liabilities
Long-term Debt, Current Maturities	0.0	0.0
Accounts payable	0.0	0.1
Employee compensation and benefits	0.0	0.0
Other current liabilities	21.4	26.7
Current liabilities held for sale		0.0
Total current liabilities	21.4	26.8
Other liabilities
Long-term debt	2,834.0	5,515.9
Pension and other post-retirement compensation and benefits	0.0	0.0
Deferred tax liabilities	0.0	0.0
Other non-current liabilities	0.0	0.0
Non-current liabilities held for sale		0.0
Total liabilities	2,855.4	5,542.7
Equity
Total equity	4,844.6	4,471.7
Total liabilities and equity	7,700.0	10,014.4
Non-Guarantor Subsidiaries
Current assets
Cash and cash equivalents	126.7	238.5	173.3	126.2
Accounts and notes receivable, net	761.1	763.9
Inventories	565.4	524.2
Other current assets	239.9	237.8
Current assets held for sale		891.9
Total current assets	1,693.1	2,656.3
Property, plant and equipment, net	550.9	538.6
Other assets
Investments in subsidiaries	0.0	0.0
Goodwill	4,314.2	4,217.4
Intangibles, net	1,624.3	1,631.8
Other non-current assets	985.8	1,568.9
Non-current assets held for sale		2,292.9
Total other assets	6,924.3	9,711.0
Total assets	9,168.3	12,905.9
Current liabilities
Long-term Debt, Current Maturities	0.3	0.8
Accounts payable	407.5	435.8
Employee compensation and benefits	143.7	165.3
Other current liabilities	387.4	379.2
Current liabilities held for sale		356.2
Total current liabilities	938.9	1,337.3
Other liabilities
Long-term debt	193.0	756.4
Pension and other post-retirement compensation and benefits	268.4	253.4
Deferred tax liabilities	546.5	609.5
Other non-current liabilities	168.5	148.2
Non-current liabilities held for sale		505.9
Total liabilities	2,115.3	3,610.7
Equity
Total equity	7,053.0	9,295.2
Total liabilities and equity	9,168.3	12,905.9
Consolidation, Eliminations [Member]
Current assets
Cash and cash equivalents	0.0	0.0	$ (0.1)	$ 0.0
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	3.0	9.2
Current assets held for sale		0.0
Total current assets	3.0	9.2
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	(16,718.6)	(18,276.4)
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	(1,328.1)	(2,142.0)
Non-current assets held for sale		0.0
Total other assets	(18,046.7)	(20,418.4)
Total assets	(18,043.7)	(20,409.2)
Current liabilities
Long-term Debt, Current Maturities	0.0	0.0
Accounts payable	0.0	0.0
Employee compensation and benefits	0.0	0.0
Other current liabilities	3.0	9.2
Current liabilities held for sale		0.0
Total current liabilities	3.0	9.2
Other liabilities
Long-term debt	(1,328.1)	(2,142.0)
Pension and other post-retirement compensation and benefits	0.0	0.0
Deferred tax liabilities	0.0	0.0
Other non-current liabilities	0.0	0.0
Non-current liabilities held for sale		0.0
Total liabilities	(1,325.1)	(2,132.8)
Equity
Total equity	(16,718.6)	(18,276.4)
Total liabilities and equity	$ (18,043.7)	$ (20,409.2)