Label	Element	Value
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date Axis: 2021-12-31
Revenue, Remaining Performance Obligation, Amount	us-gaap_RevenueRemainingPerformanceObligation	$ 280,000,000
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date Axis: 2022-12-31
Revenue, Remaining Performance Obligation, Amount	us-gaap_RevenueRemainingPerformanceObligation	1,554,000,000
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date Axis: 2020-12-31
Revenue, Remaining Performance Obligation, Amount	us-gaap_RevenueRemainingPerformanceObligation	328,000,000
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date Axis: 2019-12-31
Revenue, Remaining Performance Obligation, Amount	us-gaap_RevenueRemainingPerformanceObligation	$ 401,000,000