Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Employee waiting period after hire to participate in the defined contribution plans		90 days
Employee maximum contribution towards defined contribution plans as percentage of annual compensation		25.00%
Employer's match in cash of non-union employee contributions on first specified percentage of eligible compensation		100.00%
First percentage of eligible compensation on which specified percentage of non-union employee contribution is matched by the employer in cash		3.00%
Employer's match in cash of non-union employee contributions on next specified percentage of eligible compensation		50.00%
Next percentage of eligible compensation on which specified percentage of non-union employee contribution is matched by the employer in cash		3.00%
Employer maximum match of non-union employee contribution on eligible compensation		4.50%
Operating, selling, general and administrative expenses for our defined contribution plans		$ 61	$ 63	$ 63
Accrued benefit liabilities for defined benefit pension and other post retirement plans		56
Contributions to Multiemployer Plan		43	44	40
Multiemployer Health and Welfare Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to Multiemployer Plan		33	34	34
Withdrawal from Multiemployer Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Charge to "Operating" expenses	$ 55	51	$ 4	$ 5
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Combined accumulated benefit obligation of pension plans		116
Plan assets of pension plans		88
Unfunded benefit obligation		28
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Unfunded benefit obligation		$ 28