Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2016

The net carrying and estimated fair values of our financial instruments by class at March 31, 2016 and December 31, 2015 were as follows:



	March 31, 2016						December 31, 2015
	Net Carrying Amount			Fair Value			Net Carrying Amount		Fair Value
	(Millions)
Long-term debt (including current maturities)	$	1,312		$	1,348		$	1,125	$	1,160
Instruments with off-balance sheet risk:
Foreign exchange forward contracts:
Asset (Liability) derivative contracts	(1		)	(1		)	1		1

Summarization for Foreign Currency Forward Purchase and Sale Contracts

The following table summarizes by major currency the notional amounts for foreign currency forward purchase and sale contracts as of March 31, 2016 (all of which mature in 2016):



		Notional Amount in Foreign Currency
		(Millions)
Australian dollars	—Purchase	1
British pounds	—Purchase	39
	—Sell	(39	)
Canadian dollars	—Sell	(2	)
European euro	—Purchase	19
	—Sell	(41	)
South African rand	—Purchase	70
	—Sell	(200	)
Japanese yen	—Purchase	400
	—Sell	(416	)
U.S. dollars	—Purchase	105
	—Sell	(70	)