Stock-Based Compensation (Details 2) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Options outstanding and exercisable
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ 22	$ 3	$ 7
Options Outstanding, Weighted-Average Remaining Contractual Term	3 years 6 months
Options Outstanding, Aggregate Intrinsic Value	$ 75
Options Exercisable, Aggregate Intrinsic Value	$ 75
Closing stock price (in dollars per share)	$ 70.78
Restricted Stock
Options outstanding and exercisable
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	49.28	$ 27.51	$ 41.84
Restricted Stock Units (RSUs)
Options outstanding and exercisable
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 38.69	45.23	41.94
Performance Shares
Options outstanding and exercisable
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 13
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 7 months 6 days
Granted, Weighted-Average Grant Date Fair Value (in dollars per share)	$ 48.25	$ 47.93	$ 43.09

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=122142933&loc=d3e11374-113907

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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-Publisher FASB
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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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