Consolidated Statements of Stockholders' (Deficit) Equity - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent	Treasury Stock
Treasury stock, shares						48,800,000
Beginning balance at Dec. 31, 2020	$ (17,100,000)	$ 900,000	$ 1,113,200,000	$ 2,385,800,000	$ (97,200,000)	$ (3,419,800,000)
Net income	84,200,000			84,200,000
Dividends, Common Stock, Cash	(29,100,000)			(29,100,000)
Foreign currency translation adjustments	(2,500,000)				(2,500,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(3,600,000)				(3,600,000)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	8,500,000		8,500,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	4,100,000				4,100,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	9,600,000
Stock Issued During Period, Value, Treasury Stock Reissued	(800,000)		$ (1,400,000)			$ (2,200,000)
Treasury Stock, Shares, Acquired			(30,000,000.0)			(600,000)
Treasury Stock, Value, Acquired, Cost Method	(206,000,000.0)					$ (176,000,000.0)
Ending balance at Mar. 31, 2021	(160,700,000)	900,000	$ 1,090,300,000	2,440,900,000	(99,200,000)	$ (3,593,600,000)
Dividends	0.77
Change in cash flow hedges, tax expense	1,100,000
Pension and post-retirement liability changes, tax expense	$ 3,500,000
Treasury stock, shares						49,400,000
Treasury stock, shares	50,536,125					50,500,000
Stock repurchase program, authorized amount	$ 4,000,000,000
Beginning balance at Dec. 31, 2021	(269,000,000.0)	900,000	1,133,700,000	2,719,300,000	(88,100,000)	$ (4,034,800,000)
Net income	83,600,000			83,600,000
Dividends, Common Stock, Cash	(33,100,000)			(33,100,000)
Foreign currency translation adjustments	(1,200,000)				(1,200,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(200,000)				(200,000)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	4,700,000		4,700,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	9,000,000.0				9,000,000.0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	19,600,000
Stock Issued During Period, Value, Treasury Stock Reissued	(900,000)		$ (1,000,000.0)			$ (1,900,000)
Stock Issued During Period, Shares, Treasury Stock Reissued						(100,000)
Treasury Stock, Shares, Acquired			(27,000,000.0)			(700,000)
Treasury Stock, Value, Acquired, Cost Method	(204,900,000)					$ (177,900,000)
Ending balance at Mar. 31, 2022	(410,200,000)	$ 900,000	$ 1,110,400,000	$ 2,769,800,000	$ (80,500,000)	$ (4,210,800,000)
Dividends	0.92
Change in cash flow hedges, tax expense	3,100,000
Pension and post-retirement liability changes, tax expense	$ 200,000
Treasury stock, shares	51,127,988					51,100,000