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Supplemental Balance Sheet Information (Tables)
 12 Months Ended
Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of inventories
Inventories as of December 31 consisted of the following:
(millions)
2014
 
2013
Finished goods and work in progress
$
267

 
$
270

Raw materials
62

 
62

Total
$
329

 
$
332
Schedule of property, plant and equipment
Property, plant and equipment as of December 31 consisted of the following:
(millions)
2014
 
2013
Land and mineral deposits
$
135

 
$
181

Buildings and improvements
1,095

 
1,139

Machinery and equipment
2,563

 
2,623

 
3,793

 
3,943

Reserves for depreciation and depletion
(1,885
)
 
(1,840
)
Total
$
1,908

 
$
2,103

Annual depreciation and depletion expense
$
134

 
$
135
Schedule of accrued expenses
Accrued expenses as of December 31 consisted of the following:
(millions)
2014
 
2013
Self-insurance reserves
$
21

 
$
22

Employee compensation
42

 
58

Interest
45

 
48

Restructuring
1

 
3

Derivatives
18

 
—

Pension and other postretirement benefits
22

 
14

Environmental
16

 
18

Other
55

 
53

Total
$
220

 
$
216
Schedule of changes in balances of each component of accumulated other comprehensive income (loss)
Changes in the balances of each component of accumulated other comprehensive income (loss), or AOCI, are summarized in the following table:
(millions)
Derivatives
 
Pension and Other Postretirement Benefit Plans
 
Foreign
Currency Translation
 
Total AOCI
Balance as of January 1, 2012
$
28

 
$
(221
)
 
$
19

 
$
(174
)
Other comprehensive income (loss) before reclassifications
(5
)
 
(81
)
 
22

 
(64
)
Less: Amounts reclassified from AOCI, net of tax
(9
)
 
1

 
3

 
(5
)
Other comprehensive income (loss), net of tax
4

 
(82
)
 
19

 
(59
)
Balance as of December 31, 2012
$
32

 
$
(303
)
 
$
38

 
$
(233
)
Other comprehensive income (loss) before reclassifications
4

 
247

 
(17
)
 
234

Less: Amounts reclassified from AOCI, net of tax
1

 
(24
)
 
—

 
(23
)
Other comprehensive income (loss), net of tax
3

 
271

 
(17
)
 
257

Balance as of December 31, 2013
$
35

 
$
(32
)
 
$
21

 
$
24

Other comprehensive loss before reclassifications
(15
)
 
(272
)
 
(68
)
 
(355
)
Less: Amounts reclassified from AOCI, net of tax
4

 
(2
)
 
5

 
7

Other comprehensive loss, net of tax
(19
)
 
(270
)
 
(73
)
 
(362
)
Balance as of December 31, 2014
$
16

 
$
(302
)
 
$
(52
)
 
$
(338
)
Schedule of amounts reclassified from accumulated other comprehensive income, net of tax
Amounts reclassified from AOCI, net of tax, for the years ended December 31, 2014 and 2013, were as follows:
(millions)
 
 
2014
 
2013
Derivatives
 
 
 
 
 
Net reclassification from AOCI for cash flow hedges included in cost of products sold
 
 
$
4

 
$
1

Income tax expense on reclassification from AOCI included in income tax expense (benefit)
 
 
—

 
—

Net amount reclassified from AOCI
 
 
$
4

 
$
1

 
 
 
 
 
 
Defined Benefit Plans
 
 
 
 
 
Net reclassification from AOCI for amortization of prior service cost included in cost of products sold
 
 
$
7

 
$
(19
)
Net reclassification from AOCI for amortization of prior service cost included in selling and administrative expenses
 
 
(10
)
 
(7
)
Income tax expense on reclassification from AOCI included in income tax expense (benefit)
 
 
1

 
2

Net amount reclassified from AOCI
 
 
$
(2
)
 
$
(24
)
 
 
 
 
 
 
Foreign Currency Translation
 
 
 
 
 
Net reclassification from AOCI for translation gains realized upon the deconsolidation of foreign subsidiaries included in gain on deconsolidation
 
 
$
5

 
$
—

Income tax expense on reclassification from AOCI included in income tax expense (benefit)
 
 
—

 
—

Net amount reclassified from AOCI
 
 
$
5

 
$
—
Schedule of changes in liability for asset retirement obligations
Changes in our liability for asset retirement obligations during 2014 and 2013 consisted of the following:
(millions)
2014
 
2013
Balance as of January 1
$
132

 
$
139

Accretion expense
7

 
8

Liabilities incurred
2

 
3

Changes in estimated cash flows (a)
(13
)
 
(11
)
Liabilities settled
(2
)
 
(4
)
Foreign currency translation
(3
)
 
(3
)
Balance as of December 31
$
123

 
$
132

(a)
Changes in estimated cash flows for the year ended December 31, 2014 includes changes in estimates primarily for our gypsum quarry and ship loading facility in Windsor, Nova Scotia, Canada, which we permanently closed during the third quarter of 2011, and our mining operation in Little Narrows, Nova Scotia, Canada as a result of receiving regulatory approval of a revised reclamation plan in 2014.