Leases and Commitments Operating Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 396
Operating lease	130	$ 0
Operating Lease, Liability, Noncurrent	274
Operating Lease, Liability	$ 404