Revenue Recognition (Expected Timimg for Satisfying Remaining Performance Obligation) (Details) $ in Millions	May 04, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated revenue from our contract liability balances	$ 9	[1]
Performance obligations from contract liability balances, duration	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated revenue from our contract liability balances	$ 7	[1]
Performance obligations from contract liability balances, duration	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated revenue from our contract liability balances	$ 3	[1]
Performance obligations from contract liability balances, duration	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated revenue from our contract liability balances	$ 1	[1]
Performance obligations from contract liability balances, duration	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-12-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Estimated revenue from our contract liability balances		[1]
Performance obligations from contract liability balances, duration	1 year

[1] Amounts exclude unsatisfied performance obligations from contract liability balances with a duration of one year or less. The estimated transaction price revenue disclosed above also does not include amounts of variable consideration attributable to contracts where the consideration is constrained at May 4, 2019.