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Stock Compensation Plans - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount stock purchase price percentage	15.00%
Look-back feature period of discount stock purchase price	3 months
Minimum contribution by participant percentage	1.00%
Maximum contribution by participant percentage	10.00%
Stocks purchased by employees during the period (in shares)	0.3	0.2
Discounted price per share of stocks purchased by employees (in dollar per share)	$ 34.16	$ 30,820,000
Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	100.00%
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate period of U.S. Treasury yield	3 years
Restricted Stock Units | Restricted stock units granted February 23, 2021
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, Weighted Average Grant Date Fair Value	$ 57.67
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 228
Weighted average period to recognized compensation cost related to unvested awards	1 year 2 months 12 days
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested awards	$ 15
Weighted average period to recognized compensation cost related to unvested awards	6 months

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Discount rate from fair value on purchase date that participants pay for shares.

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The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

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