Leases and Commitments Leases and Commitments - Operating Lease Assets and Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Total operating leases	$ 85	$ 0
Operating leases, current	18	$ 0
Operating leases, noncurrent	67
Total operating lease liabilities	$ 85