XML 75 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Employee benefit plans (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2013
Defined Benefit Pension Plans [Member] |
Components of Net Periodic Defined Benefit Pension Benefit Cost | Defined benefit plans – The components of our net periodic defined benefit pension cost are presented in the table below.
|  | Three months ended March 31, |
|  | 2012 |  |  | 2013 |
|  | (In millions) |
Service cost |  | $ | 2.6 |  |  | $ | 3.3 |
Interest cost |  |  | 6.4 |  |  |  | 6.1 |
Expected return on plan assets |  |  | (5.5 | ) |  |  | (6.1 | )
Amortization of unrecognized: |  |  |  |  |  |  |  |
Prior service cost |  |  | .4 |  |  |  | .4 |
Net transition obligations |  |  | .1 |  |  |  | .1 |
Actuarial losses |  |  | 2.3 |  |  |  | 3.4 |
Total |  | $ | 6.3 |  |  | $ | 7.2 |
OPEB [Member] |
Components of Net Periodic Defined Benefit Pension Benefit Cost | Other postretirement benefits - The components of our net periodic other postretirement benefit cost are presented in the table below.
|  | Three months ended March 31, |
|  | 2012 |  |  | 2013 |
|  | (In millions) |
Service cost |  | $ | .1 |  |  | $ | .1 |
Interest cost |  |  | .2 |  |  |  | .2 |
Amortization of prior service credit |  |  | (.5 | ) |  |  | (.5 | )
Total |  | $ | (.2 | ) |  | $ | (.2 | )

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration