Employee Benefit Plans - Schedule of Fair Value of Plan Assets Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	$ 89	$ 98
Corporate bonds (S&P rating of A or higher)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	15	15
Corporate bonds (S&P rating of lower than A)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	29	30
US Treasury and Government
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	31	40
Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	11	12
Municipal bonds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	1	1
Money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	2
Common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	143	129
Total plan assets
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	232	227
Level 1
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 1 | Corporate bonds (S&P rating of A or higher)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 1 | Corporate bonds (S&P rating of lower than A)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 1 | US Treasury and Government
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 1 | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 1 | Municipal bonds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 1 | Money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	89	98
Level 2 | Corporate bonds (S&P rating of A or higher)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	15	15
Level 2 | Corporate bonds (S&P rating of lower than A)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	29	30
Level 2 | US Treasury and Government
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	31	40
Level 2 | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	11	12
Level 2 | Municipal bonds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	1	1
Level 2 | Money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	2
Level 3
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 3 | Corporate bonds (S&P rating of A or higher)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 3 | Corporate bonds (S&P rating of lower than A)
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 3 | US Treasury and Government
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 3 | Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	0
Level 3 | Municipal bonds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	0	$ 0
Level 3 | Money market funds
Defined Benefit Plan Disclosure [Line Items]
Assets in fair value hierarchy	$ 0