Stock-Based Compensation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Weighted-Average Remaining Contractual Term	3 years 6 months
Options Outstanding, Aggregate Intrinsic Value	$ 75,000,000
Maximum number of shares reserved for grant awards under the plan	13,900,000
Number of shares counted against reserve for determining number of shares of stock available for grant under the Plan for each option	1
Number of shares counted against reserve for each share of stock granted, other than option or stock appreciation right	1.61
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	5,000,000
Maximum number of underlying shares that may be granted to a participant in any one calendar year	5,000,000
Stock options, shares
Outstanding at the beginning of the period (in shares)	4,569,041
Exercised (in shares)	(1,806,940)	(321,465)	(629,186)
Forfeited (in shares)	0
Expired (in shares)	(124,515)
Outstanding at the end of the period (in shares)	2,637,586	4,569,041
Exercisable balance at the end of the period (in shares)	2,637,586
Stock option activity, weighted-average exercise price
Outstanding at the beginning of the period, Weighted-Average Exercise Price (in dollars per share)	$ 40.41
Exercised, Weighted-Average Exercise Price (in dollars per share)	36.45
Forfeited, Weighted-Average Exercise Price (in dollars per share)	0
Expired, Weighted-Average Grant Date Fair Value (in dollars per share)	53.80
Outstanding at the end of the period, Weighted-Average Exercise Price (in dollars per share)	42.48	$ 40.41
Exercisable balance at the end of the period, Weighted-Average Exercise Price (in dollars per share)	$ 42.48
Selected amounts pertaining to stock option exercises:
Proceeds from issuances of common stock under employee stock plans	$ 64,000,000	$ 5,000,000	$ 19,000,000
Stock-based compensation costs
Stock-based compensation expense	30,000,000	26,000,000	28,000,000
Income tax benefit	(7,000,000)	(6,000,000)	(6,000,000)
Stock-based compensation expense, net of income taxes	23,000,000	20,000,000	22,000,000
Excess tax benefit from stock-based compensation	$ (22,000,000)	$ (3,000,000)	$ (7,000,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(29,000,000)	(22,000,000)	(11,000,000)
Options Exercisable, Weighted-Average Remaining Contractual Term	3 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 75,000,000
EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromVestingOfEquityInstrumentsOtherThanOptions	$ 7,000,000	$ 5,000,000	$ 3,000,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual life	10 years
Selected amounts pertaining to stock option exercises:
Proceeds from issuances of common stock under employee stock plans	$ 64,000,000	8,000,000	18,000,000
Actual tax benefit realized from stock option exercises	9,000,000	1,000,000	3,000,000
Pre-tax intrinsic value of stock options exercised	$ 39,000,000	$ 4,000,000	$ 12,000,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	35,508	50,895
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 49.28	$ 27.51
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	35,508
Selected amounts pertaining to stock option exercises:
Vesting period	3 years
Restricted stock activity, weighted-average exercise price
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 49.28	$ 27.51	$ 41.84
Stock-based compensation costs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(50,895)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 27.51
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 0
Restricted Stock | Non-management member of Board of Directors
Selected amounts pertaining to stock option exercises:
Vesting period	1 year
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	660,849	614,094
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 40.98	$ 43.70
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	389,059
Restricted stock activity, weighted-average exercise price
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 38.69	$ 45.23	41.94
Stock-based compensation costs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(310,061)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 43.38
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(32,243)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 42.02
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	425,268	445,498
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 46.83	$ 45.72
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	243,845
Restricted stock activity, weighted-average exercise price
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 48.25	$ 47.93	$ 43.09
Stock-based compensation costs
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 13,000,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(243,406)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 45.73
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(20,669)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 47.42
Restricted Stock Units and Restricted Stock Awards [Member]
Stock-based compensation costs
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 15,000,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 7 months 6 days