Business Optimization Charges - Summary of Business Optimization Charges (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 25	$ 25
Business Optimization Programs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	25	25
Costs to implement business optimization programs	7	10
Accelerated depreciation	0	3
Total business optimization charges	$ 32	$ 38

Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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