Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Financial Instruments

Carrying amounts and fair values of the financial instruments

	December 31, 2016				December 31, 2015
	Carrying		Fair		Carrying		Fair
	amount		value		amount		value
Cash and cash equivalents	$	3,052	$	3,052	$	2,339	$	2,339
Restricted cash balances and investments		510		511		467		474
Long-term debt, including current maturities		8,464		8,218		8,490		6,291