Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Effects of Revision on PHI's Consolidated Balance Sheets

the table below illustrates the effects of this revision on PHI’s consolidated balance sheets as of March 31, 2013 and December 31, 2012, 2011, 2010 and 2009 for those line items affected (these revisions have no impact on PHI’s consolidated statements of income (loss), comprehensive income (loss), and cash flows for the periods reported in these consolidated financial statements).

	As Filed			Adjustment			As Revised
	(millions of dollars)
March 31, 2013
Deferred income tax liabilities, net	$	2,685		$	32		$	2,717
Total deferred credits		4,270			32			4,302
Retained earnings		612			(32	)		580
Total equity		4,278			(32	)		4,246
December 31, 2012
Deferred income tax liabilities, net	$	3,176		$	32		$	3,208
Total deferred credits		4,819	(a)		32			4,851
Retained earnings		1,109			(32	)		1,077
Total equity		4,446			(32	)		4,414
December 31, 2011
Deferred income tax liabilities, net	$	2,863		$	32		$	2,895
Total deferred credits		4,533			32			4,565
Retained earnings		1,072			(32	)		1,040
Total equity		4,336			(32	)		4,304
December 31, 2010
Retained earnings	$	1,059		$	(32	)	$	1,027
December 31, 2009
Retained earnings	$	1,268		$	(32	)	$	1,236

(a) The amount of total deferred credits differs from the amount reported in PHI’s 2012 Form 10-K due to certain reclassifications.