Earnings (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings (Loss) Per Share [Abstract]

Reconciliation of basic earnings (loss) per share to diluted earnings (loss) per share

(millions, except per-share and share data)	Net Loss		Shares (000)		Weighted Average Per-Share Amount
Three Months Ended March 31, 2012:
Basic loss		$    (27)		105,718	$	(0.26)
Diluted loss		$    (27)		105,718	$	(0.26)
Three Months Ended March 31, 2011:
Basic loss		$  (105)		103,021	$	(1.01)
Diluted loss		$  (105)		103,021	$	(1.01)