Financial Statements of Parent Company Guarantor - Condensed Consolidating Balance Sheet (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 108.5	$ 238.5	$ 170.9	$ 126.3
Accounts and notes receivable, net	768.2	764.0
Inventories	579.2	524.2
Other current assets	249.9	253.4
Current assets held for sale	0.0	891.9
Total current assets	1,705.8	2,672.0
Property, plant and equipment, net	547.1	538.6
Other assets
Investments in subsidiaries	0.0	0.0
Goodwill	4,343.6	4,217.4
Intangibles, net	1,607.3	1,631.8
Other non-current assets	425.0	182.1
Non-current assets held for sale	0.0	2,292.9
Total other assets	6,375.9	8,324.2
Total assets	8,628.8	11,534.8
Current liabilities
Long-term Debt, Current Maturities	0.0	0.8
Accounts payable	383.4	436.6
Employee compensation and benefits	160.5	166.1
Other current liabilities	528.7	511.5
Current liabilities held for sale	0.0	356.2
Total current liabilities	1,072.6	1,471.2
Other liabilities
Long-term debt	1,503.4	4,278.4
Pension and other post-retirement compensation and benefits	275.1	253.4
Deferred tax liabilities	549.5	609.5
Other non-current liabilities	219.6	162.0
Non-current liabilities held for sale	0.0	505.9
Total liabilities	3,620.2	7,280.4
Equity
Total equity	5,008.6	4,254.4	4,355.3	4,008.8
Total liabilities and equity	8,628.8	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	2.5	0.1
Inventories	0.0	0.0
Other current assets	2.3	1.2
Current assets held for sale		0.0
Total current assets	4.9	1.3
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	4,993.2	4,509.5
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	121.4	2.2
Non-current assets held for sale		0.0
Total other assets	5,114.6	4,511.7
Total assets	5,119.5	4,513.0
Current liabilities
Long-term Debt, Current Maturities	0.0	0.0
Accounts payable	1.3	0.7
Employee compensation and benefits	0.3	0.8
Other current liabilities	74.4	95.2
Current liabilities held for sale		0.0
Total current liabilities	76.0	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	110.9	258.6
Equity
Total equity	5,008.6	4,254.4
Total liabilities and equity	5,119.5	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	2.0	4.1
Current assets held for sale		0.0
Total current assets	2.0	4.1
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	4,880.7	4,471.4
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	110.9	35.2
Non-current assets held for sale		0.0
Total other assets	4,991.6	4,506.6
Total assets	4,993.6	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	0.4	1.2
Current liabilities held for sale		0.0
Total current liabilities	0.4	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	0.4	1.2
Equity
Total equity	4,993.2	4,509.5
Total liabilities and equity	4,993.6	4,510.7
Subsidiary Issuer
Current assets
Cash and cash equivalents	0.3	0.0	0.0	0.1
Accounts and notes receivable, net	0.0	0.0
Inventories	0.0	0.0
Other current assets	7.3	1.1
Current assets held for sale		0.0
Total current assets	7.6	1.1
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	6,989.7	9,295.5
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	592.2	717.8
Non-current assets held for sale		0.0
Total other assets	7,581.9	10,013.3
Total assets	7,589.5	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	4.7	26.7
Current liabilities held for sale		0.0
Total current liabilities	4.7	26.8
Other liabilities
Long-term debt	2,704.3	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	2,709.0	5,542.7
Equity
Total equity	4,880.5	4,471.7
Total liabilities and equity	7,589.5	10,014.4
Non-Guarantor Subsidiaries
Current assets
Cash and cash equivalents	108.1	238.5	170.9	126.2
Accounts and notes receivable, net	765.7	763.9
Inventories	579.2	524.2
Other current assets	250.2	237.8
Current assets held for sale		891.9
Total current assets	1,703.2	2,656.3
Property, plant and equipment, net	547.1	538.6
Other assets
Investments in subsidiaries	0.0	0.0
Goodwill	4,343.6	4,217.4
Intangibles, net	1,607.3	1,631.8
Other non-current assets	1,391.3	1,568.9
Non-current assets held for sale		2,292.9
Total other assets	7,342.2	9,711.0
Total assets	9,592.5	12,905.9
Current liabilities
Long-term Debt, Current Maturities	0.0	0.8
Accounts payable	382.1	435.8
Employee compensation and benefits	160.2	165.3
Other current liabilities	461.1	379.2
Current liabilities held for sale		356.2
Total current liabilities	1,003.4	1,337.3
Other liabilities
Long-term debt	589.9	756.4
Pension and other post-retirement compensation and benefits	275.1	253.4
Deferred tax liabilities	549.5	609.5
Other non-current liabilities	184.7	148.2
Non-current liabilities held for sale		505.9
Total liabilities	2,602.6	3,610.7
Equity
Total equity	6,989.9	9,295.2
Total liabilities and equity	9,592.5	12,905.9
Consolidation, Eliminations [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	(11.9)	9.2
Current assets held for sale		0.0
Total current assets	(11.9)	9.2
Property, plant and equipment, net	0.0	0.0
Other assets
Investments in subsidiaries	(16,863.6)	(18,276.4)
Goodwill	0.0	0.0
Intangibles, net	0.0	0.0
Other non-current assets	(1,790.8)	(2,142.0)
Non-current assets held for sale		0.0
Total other assets	(18,654.4)	(20,418.4)
Total assets	(18,666.3)	(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	(11.9)	9.2
Current liabilities held for sale		0.0
Total current liabilities	(11.9)	9.2
Other liabilities
Long-term debt	(1,790.8)	(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	(1,802.7)	(2,132.8)
Equity
Total equity	(16,863.6)	(18,276.4)
Total liabilities and equity	$ (18,666.3)	$ (20,409.2)